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Hi All. First time poster here. I recently bought a Bally. It has the overheating problem, but with a laptop cooler and having removed the RF shield it seems to run fine enough to play games without crashing. However, it has permanent, frozen stuck pixels at the top of the screen in the MENU screen and in every game (see pics). And these pixels annoyingly interact with and affect the game mechanics. Allen has been nice enough to work with me and suspects a RAM issue and suggests replacing the MK4096N-15's I have. I'd like to keep de-soldering and soldering to a bare minimum so does anyone know which of the 8 physical RAM chip of U24 to U31 would relate to the top of the 1/8th of the screen with the screen map? According to the Nutting Manual the screen RAM takes up 4K and there are 102 lines on the screen with each line using 40 bytes. So would it go sequentially top to bottom starting from U24 with each chip representing about 13 screen lines or am I missing something? Thanks, Cliff